Help! Can't install applications

I jailbroke my iPod, and installed applications. Later, I edited the N45AP.plist file so I can change the order of icons. Now, I can't install applications. The installer runs up until it should be finalizing and adding an icon, but it conks out and returns to the home screen.
I put in the old N45AP.plist, and the same thing happens. The permissions on the file is set to 775, so the system should be able to access it.

Crud! Me too! If you find a way to fix this problem, please tell me, because the ability to load all of these third party apps is why i have an ipod touch in the first place! If it is broken for good, then i am going to force a reinstall and jailbreak again!
the only thing that ever worked for me was to start uninstalling some of the last programs i had installed until it started working again, bu that has seemed to stop working as of late! Good luck!

hey dude, this just happened to me yesterday and i fixed it. try unistalling the last app or the last couple of apps you downloaded. Hopefully when you try to download another app it will work, its what i did

hey dude, this just happened to me yesterday and i fixed it. try unistalling the last app or the last couple of apps you downloaded. Hopefully when you try to download another app it will work, its what i did

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I did a couple of apps, but it's still going on. I'm afraid if I remove more apps, I'll never get them back on.

Yah.. I ironically JUST managed to fix it..
I think it was the ipod touch customize that messed it up (the one from this forum like for only ipod touch)..
I then deleted the apps that weren't showing from my computer and then now it works.